1 files changed, 39 insertions, 0 deletions
diff --git a/qa/qa/factory/dependency.rb b/qa/qa/factory/dependency.rb
new file mode 100644
index 00000000000..fc5dc82ce29
--- /dev/null
+++ b/qa/qa/factory/dependency.rb
@@ -0,0 +1,39 @@
+module QA
+  module Factory
+    class Dependency
+      Signature = Struct.new(:factory, :block)
+
+      def initialize(name, factory, signature)
+        @name = name
+        @factory = factory
+        @signature = signature
+      end
+
+      def overridden?
+        !!@factory.public_send(@name)
+      end
+
+      def build!
+        return if overridden?
+
+        Builder.new(@signature, @factory).fabricate!.tap do |product|
+          @factory.public_send("#{@name}=", product)
+        end
+      end
+
+      class Builder
+        def initialize(signature, caller_factory)
+          @factory = signature.factory
+          @block = signature.block
+          @caller_factory = caller_factory
+        end
+
+        def fabricate!
+          @factory.fabricate! do |factory|
+            @block&.call(factory, @caller_factory)
+          end
+        end
+      end
+    end
+  end
+end